The dynamic mechanical properties of a (Zr77.5Ti 22.5)55(Ni48Cu52) 21.25Be23.75 amorphous alloy were investigated by frequency-dependent elastic moduli and isothermal multi-frequency measurements. The frequency-dependent loss modulus showed a relaxation behavior resulting from a glass transition, and the variation of the peak frequency was related to the Arrhenius equation. Isothermal multi-frequency measurement data were used to construct the master curves of the elastic moduli and tan δ by applying the time-temperature superposition principle. The temperature dependence of the shift factor was found to follow the Arrhenius relationship, and the activation energies for the low temperature relaxation and glass transition were approximately 156.6 kJ/mol and 554 kJ/mol, respectively. The glass transition temperature (Tg) was manifested by the crossover region of the shift factor dependence, and from the relationship between the shift factors and the temperature above Tg, the fragility index of this alloy was estimated.
|Number of pages||7|
|Journal||Metals and Materials International|
|Publication status||Published - 2007 Dec|
Bibliographical noteFunding Information:
This work was supported by the Second Stage of Brain Korea 21 Project in Division of Humantronics Information Materials.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Mechanics of Materials
- Metals and Alloys
- Materials Chemistry